Bar`ri*cade" (&?;), n. [F. barricade, fr. Sp. barricada, orig. a barring up with casks; fr. barrica cask, perh. fr. LL. barra bar. See Bar, n., and cf. Barrel, n.]

1. (Mil.) A fortification, made in haste, of trees, earth, palisades, wagons, or anything that will obstruct the progress or attack of an enemy. It is usually an obstruction formed in streets to block an enemy's access.

2. Any bar, obstruction, or means of defense.

Such a barricade as would greatly annoy, or absolutely stop, the currents of the atmosphere.
Derham.

Bar`ri*cade", v. t. [imp. & p. p. Barricaded; p. pr. & vb. n. Barricading.] [Cf. F. barricader. See Barricade, n.] To fortify or close with a barricade or with barricades; to stop up, as a passage; to obstruct; as, the workmen barricaded the streets of Paris.

The further end whereof [a bridge] was barricaded with barrels.
Hakluyt.

• a barrier constructed across a road, especially as a military defence
  
• an obstacle, barrier or bulwark
  
• to close or block a road etc., using a barricade
  
• to keep someone in (or out), using a blockade, especially ships in a port